Benchmark

This benchmark compares performance of JSON serialization and HTML template rendering. In a server returning HTML or JSON the main difference is with the serialization. So I wanted to know how much difference it makes to return a JSON response vs HTML response. So I just tested json serialization vs html template rendering in Go. Benchmarking Setup The setup is simple, with go test, main_test.go package main import ( "bytes" "encoding/json" "testing" "text/template" "github.com/flosch/pongo2/v6" ) // Example struct to marshal type SimpleStruct struct { Field1 string `json:"field1"` Field2 int `json:"field2"` } // BenchmarkJsonMarshalling tests the performance of JSON marshaling. func BenchmarkJsonMarshalling(b *testing.B) { // setup any necessary data for the benchmark data := SimpleStruct{ Field1: "example", Field2: 123, } // Run the benchmark for i := 0; i < b.N; i++ { _, err := json.Marshal(data) if err != nil { b.Fatal(err) } } } func BenchmarkHTMLRenderingWithPongo(b *testing.B) { tpl, err := pongo2.FromString("Hello {{ name }}!") if err != nil { panic(err) } // Run the benchmark for i := 0; i < b.N; i++ { _, err := tpl.Execute(pongo2.Context{"name": "florian"}) if err != nil { b.Fatal(err) } } } func BenchmarkHTMLRenderingWithTemplate(b *testing.B) { data := map[string]string{ "Field1": "example", } tmpl := template.Must(template.New("test").Parse("Hello {{ .Field1 }}!")) // Run the benchmark for i := 0; i < b.N; i++ { memory := new(bytes.Buffer) err := tmpl.Execute(memory, data) if err != nil { b.Fatal(err) } } } Benchmarking Results BenchmarkJsonMarshalling-14 9746420 103.6 ns/op BenchmarkHTMLRenderingWithPongo-14 2557006 467.0 ns/op BenchmarkHTMLRenderingWithTemplate-14 7220666 168.7 ns/op My Thoughts JSON serialization is bit faster than HTML template rendering. ...